Converter large-face repair material and preparation method thereof

A large fabric and repairing technology, which is applied in the field of metallurgy and converter repair materials, can solve problems such as unfavorable promotion and application of large fabrics, consume large mineral resources, and affect production requirements, so as to shorten furnace repair time, reduce inventory costs, and speed up production. The effect of construction progress

Inactive Publication Date: 2019-04-02
海城利尔麦格西塔材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many kinds of products for converter repairing large fabrics. Although they all have a certain repairing effect, there are many deficiencies in their performance such as service time, raw material cost and sinterability. The specific performance is as follows: 1. Long sintering time: Generally, 0.8-1.5 tons of large fabrics for repairing steel are put in at a time, and the sintering time takes 80-100 minutes, which seriously affects the production requirements; 2. The materials used are mainly magnesia and forsterite, which consume a lot of mineral resources. Not only is it not conducive to environmental protection, but also the cost is high, which is not conducive to the promotion and application of large fabrics; 3. Short service life: the service life of a repair furnace is about 10 hours

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A large fabric for converter repairing, which is composed of the following components and the mass percentage of each component is: regenerated magnesia carbon: 25wt%; high-iron magnesia: 30wt%; silicon carbide: 25wt%; Powder: 2wt%; Iron scale: 4wt%; SD80: 3wt%; Caprolactam: 3wt%.

[0023] In the regenerated magnesia-carbon, the regenerated magnesia-carbon brick material with a particle size of 0.8mm: 15wt%; the regenerated magnesia-carbon brick material with a particle size of 0.088mm: 10wt%.

[0024] Among the high-iron magnesia, the high-iron magnesia with a particle size of 2mm: 14wt%; the high-iron magnesia with a particle size of 0.8mm: 16wt%.

[0025] In silicon carbide, the silicon carbide material with a particle size of 2mm: 10wt%; the silicon carbide material with a particle size of 0.7mm: 15wt%.

[0026] Ti in the high iron magnesia 2 o 3 The content of +MgO was 93%.

[0027] Using regenerated magnesia carbon, high-iron magnesia and silicon carbide as th...

Embodiment 2

[0037] A large fabric for converter repairing, which is composed of the following components and the mass percentage of each component is: regenerated magnesia carbon: 25wt%; high-iron magnesia: 30wt%; silicon carbide: 25wt%; Powder: 2wt%; Iron scale: 4wt%; SD80: 3wt%; Caprolactam: 3wt%.

[0038] In the regenerated magnesia carbon, the regenerated magnesia carbon brick material with a particle size of 0.5mm: 15wt%; the regenerated magnesia carbon brick material with a particle size of 0.088mm: 10wt%.

[0039] Among the high-iron magnesia, the high-iron magnesia with a particle size of 1mm: 14wt%; the high-iron magnesia with a particle size of 0.3mm: 16wt%.

[0040]In silicon carbide, the silicon carbide material with a particle size of 1mm: 10wt%; the silicon carbide material with a particle size of 0.3mm: 15wt%.

[0041] Ti in the high iron magnesia 2 o 3 The content of +MgO was 92%.

Embodiment 3

[0043] A large fabric for converter repairing, which is composed of the following components and the mass percentage of each component is: regenerated magnesia carbon: 25wt%; high-iron magnesia: 30wt%; silicon carbide: 25wt%; Powder: 2wt%; Iron scale: 4wt%; SD80: 3wt%; Caprolactam: 3wt%.

[0044] In the regenerated magnesia-carbon, the regenerated magnesia-carbon brick material with a particle size of 1mm: 15wt%; the regenerated magnesia-carbon brick material with a particle size of 0.088mm: 10wt%.

[0045] Among the high-iron magnesia, the high-iron magnesia with a particle size of 3mm: 14wt%; the high-iron magnesia with a particle size of 1mm: 16wt%.

[0046] In silicon carbide, the silicon carbide material with a particle size of 3mm: 10wt%; the silicon carbide material with a particle size of 1mm: 15wt%.

[0047] Ti in the high iron magnesia 2 o 3 The content of +MgO is above 92%.

[0048] The invention adopts regenerated magnesia carbon, high-iron magnesia and silicon...

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PUM

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Abstract

The invention relates to the field of metallurgy and converter repair materials, in particular to a converter large-face repair material and a preparation method thereof. The converter large-face repair material is composed of the following components in percentage by mass: regenerated magnesia carbon 25wt%, high-iron magnesia 30wt%, silicon carbide 25wt%, medium-temperature coal pitch 10wt%, aluminum powder 2wt%, iron scale 4wt%, SD80 3 wt%, and caprolactam 3 wt%. When applied to converter equipment, the converter large-face repair material prepared according to the formula has the advantagesof high adhesion rate, good peeling resistance, fast sintering speed, erosion resistance, scouring resistance and small high-temperature expansion, and the adhesion rate is 97% or more. Mineral resources of the magnesia raw material are rich, auxiliary raw materials are easy to obtain, the formula is simple, and the inventory cost of the raw materials is reduced. The high adhesion of the productnot only reduces the production cost, but also reduces the adverse effects of residue on molten steel. At the same time, the construction progress is accelerated, the converter repair time is shortened, the service life of the converter is prolonged, and the consumption of refractory materials is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy and the field of converter repair materials, in particular to a large fabric for converter repair and a preparation method thereof. Background technique [0002] Because the converter steelmaking equipment works in a high temperature environment for a long time, and the wear and tear is very serious, it is necessary to repair the lost parts with repair materials after a period of use, so as to maintain the normal work of the converter steelmaking. Converter large surface sintered repair material is an important material to improve the life of the converter. The large surface sintered repair material can make up for the durability that is difficult to achieve by spraying materials. It is suitable for the charging side furnace wall, furnace bottom, tapping side furnace wall, and furnace cap. Inflection point, etc., the effect is more obvious. The combination of repairing materials will directly affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/043C04B35/62204C04B35/83C04B2235/3232C04B2235/3272C04B2235/3418C04B2235/3826C04B2235/402C04B2235/422C04B2235/77
Inventor 耿贺贺张义先尹斌金钊
Owner 海城利尔麦格西塔材料有限公司
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